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David HJ

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  1. Unknown USB Device

    Hi sslyutov, Still not working. It's not a hurry, so I'll just wait until finding some solutions online. Thanks for your concerns!
  2. Unknown USB Device

    Thank you both! sslyutov, your description is exactly what I see in another PC. But in this PC, there is only the "unknown device". And one more thing. I remember that, initially, this PC could recognize the Casio MIDI when I first installed windows 10. But after using it for a while and also having some other software installed, the problem arose. So, I'm not yet sure whether it's a compatibility issue or firmware issue.
  3. Unknown USB Device

    Thank you! I've tried these three ways and they don't work.
  4. Unknown USB Device

    Yes, but the Casio MIDI is not shown in the input list. I'm using FL studio.
  5. Unknown USB Device

    I'm using px-850. In the manual it does says that there is no need to install any other third party driver. And since it can automatically install driver in another pc, I think you are right. I haven't consult the casio customer support. I'll do it now. Thanks for advice! I've contact a customer representative. He says since the pc has recognize the digital piano as an "unknown usb device", meaning they have establish physical connection. He suggest me to configure the software to recognize it. But the software's manual says the MIDI connection should be established automatically prior to the software configuration. Do you have any other idea?
  6. Unknown USB Device

    Has anyone experience this situation, connecting a digital piano to pc and get "unknown usb device (device descriptor request failed)"? This problem persist after I uninstall it in device manager and reinstall it. How can you fix it? But interestingly, it works properly in another windows 10 laptop. Below are the detailed logs I got from pc and laptop when connecting the digital piano to them. During the failing connection, I get 4 events in event viewer: Event 420: (This happens as I uninstall the device in device manager) Device USB\VID_0000&PID_0002\5&15C311E1&0&5 was deleted. Class Guid: {36fc9e60-c465-11cf-8056-444553540000} Event 400: Device USB\VID_0000&PID_0002\5&15c311e1&0&5 was configured. Driver Name: usb.inf Class Guid: {36fc9e60-c465-11cf-8056-444553540000} Driver Date: 06/21/2006 Driver Version: 10.0.14393.0 Driver Provider: Microsoft Driver Section: BADDEVICE.Dev.NT Driver Rank: 0xFF0000 Matching Device Id: USB\DEVICE_DESCRIPTOR_FAILURE Outranked Drivers: usb.inf:USB\DEVICE_DESCRIPTOR_FAILURE:00FF2000 Device Updated: false Parent Device: USB\ROOT_HUB30\4&1ed8c4ae&0&0 Sometimes event 411: (this is when "Device Descriptor Request Failed" is shown) Device USB\VID_0000&PID_0002\5&15c311e1&0&5 had a problem starting. Driver Name: usb.inf Class Guid: {36fc9e60-c465-11cf-8056-444553540000} Service: Lower Filters: Upper Filters: Problem: 0x2B Problem Status: 0x0 And sometimes event 410: ( this is when "Set Address Failed" is shown) Device USB\VID_0000&PID_0002\5&15c311e1&0&5 was started. Driver Name: usb.inf Class Guid: {36fc9e60-c465-11cf-8056-444553540000} Service: Lower Filters: Upper Filters: The digital piano can successfully connect to another windows 10 x64 laptop. During the successful connection, I also get 4 events: Event 430: Device USB\VID_07CF&PID_6803&MI_00\7&307c0135&1&0000 requires further installation. Event 441: Device USB\VID_07CF&PID_6803&MI_00\7&307c0135&1&0000 could not be migrated. Last Device Instance Id: HDAUDIO\FUNC_01&VEN_10DE&DEV_0040&SUBSYS_10438432&REV_1001\5&21611EBD&0&0001 Class Guid: {4d36e96c-e325-11ce-bfc1-08002be10318} Location Path: Migration Rank: 0xF000FFFFFFFFF122 Present: false Status: 0xC0000719 Event 20003 Driver Management has concluded the process to add Service usbaudio for Device Instance ID USB\VID_07CF&PID_6803&MI_00\7&307C0135&1&0000 with the following status: 0. And event 20001 Driver Management concluded the process to install driver wdma_usb.inf_amd64_134cb113911feba4\wdma_usb.inf for Device Instance ID USB\VID_07CF&PID_6803&MI_00\7&307C0135&1&0000 with the following status: 0x0. Thanks!